fsfw/osal/FreeRTOS/Mutex.cpp

#include "Mutex.h"

#include "../../serviceinterface/ServiceInterfaceStream.h"

Mutex::Mutex() {
	handle = xSemaphoreCreateMutex();
	if(handle == nullptr) {
#if FSFW_CPP_OSTREAM_ENABLED == 1
		sif::error << "Mutex::Mutex(FreeRTOS): Creation failure" << std::endl;
#endif
	}
}

Mutex::~Mutex() {
	if (handle != nullptr) {
		vSemaphoreDelete(handle);
	}

}

ReturnValue_t Mutex::lockMutex(TimeoutType timeoutType,
        uint32_t timeoutMs) {
	if (handle == nullptr) {
		return MutexIF::MUTEX_NOT_FOUND;
	}
	// If the timeout type is BLOCKING, this will be the correct value.
	uint32_t timeout = portMAX_DELAY;
	if(timeoutType == TimeoutType::POLLING) {
		timeout = 0;
	}
	else if(timeoutType == TimeoutType::WAITING){
		timeout = pdMS_TO_TICKS(timeoutMs);
	}

	BaseType_t returncode = xSemaphoreTake(handle, timeout);
	if (returncode == pdPASS) {
		return HasReturnvaluesIF::RETURN_OK;
	} else {
		return MutexIF::MUTEX_TIMEOUT;
	}
}

ReturnValue_t Mutex::unlockMutex() {
	if (handle == nullptr) {
		return MutexIF::MUTEX_NOT_FOUND;
	}
	BaseType_t returncode = xSemaphoreGive(handle);
	if (returncode == pdPASS) {
		return HasReturnvaluesIF::RETURN_OK;
	} else {
		return MutexIF::CURR_THREAD_DOES_NOT_OWN_MUTEX;
	}
}